LXR linux-old/include/asm-arm/page.h

   1#ifndef _ASMARM_PAGE_H
   2#define _ASMARM_PAGE_H
   3
   4#include <asm/proc/page.h>
   5
   6#define PAGE_SIZE       (1UL << PAGE_SHIFT)
   7#define PAGE_MASK       (~(PAGE_SIZE-1))
   8
   9#ifdef __KERNEL__
  10#ifndef __ASSEMBLY__
  11
  12#define STRICT_MM_TYPECHECKS
  13
  14#define clear_page(page)        memzero((void *)(page), PAGE_SIZE)
  15extern void copy_page(void *to, void *from);
  16
  17#define clear_user_page(page, vaddr)    clear_page(page)
  18#define copy_user_page(to, from, vaddr) copy_page(to, from)
  19
  20#ifdef STRICT_MM_TYPECHECKS
  21/*
  22 * These are used to make use of C type-checking..
  23 */
  24typedef struct { unsigned long pte; } pte_t;
  25typedef struct { unsigned long pmd; } pmd_t;
  26typedef struct { unsigned long pgd; } pgd_t;
  27typedef struct { unsigned long pgprot; } pgprot_t;
  28
  29#define pte_val(x)      ((x).pte)
  30#define pmd_val(x)      ((x).pmd)
  31#define pgd_val(x)      ((x).pgd)
  32#define pgprot_val(x)   ((x).pgprot)
  33
  34#define __pte(x)        ((pte_t) { (x) } )
  35#define __pmd(x)        ((pmd_t) { (x) } )
  36#define __pgd(x)        ((pgd_t) { (x) } )
  37#define __pgprot(x)     ((pgprot_t) { (x) } )
  38
  39#else
  40/*
  41 * .. while these make it easier on the compiler
  42 */
  43typedef unsigned long pte_t;
  44typedef unsigned long pmd_t;
  45typedef unsigned long pgd_t;
  46typedef unsigned long pgprot_t;
  47
  48#define pte_val(x)      (x)
  49#define pmd_val(x)      (x)
  50#define pgd_val(x)      (x)
  51#define pgprot_val(x)   (x)
  52
  53#define __pte(x)        (x)
  54#define __pmd(x)        (x)
  55#define __pgd(x)        (x)
  56#define __pgprot(x)     (x)
  57
  58#endif
  59#endif /* !__ASSEMBLY__ */
  60
  61/* to align the pointer to the (next) page boundary */
  62#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  63
  64#ifndef __ASSEMBLY__
  65
  66extern void __bug(const char *file, int line, void *data);
  67
  68#define BUG()           __bug(__FILE__, __LINE__, NULL)
  69#define PAGE_BUG(page)  __bug(__FILE__, __LINE__, page)
  70
  71/* Pure 2^n version of get_order */
  72static inline int get_order(unsigned long size)
  73{
  74        int order;
  75
  76        size = (size-1) >> (PAGE_SHIFT-1);
  77        order = -1;
  78        do {
  79                size >>= 1;
  80                order++;
  81        } while (size);
  82        return order;
  83}
  84
  85#endif /* !__ASSEMBLY__ */
  86
  87#include <linux/config.h>
  88#include <asm/arch/memory.h>
  89
  90#define __pa(x)                 __virt_to_phys((unsigned long)(x))
  91#define __va(x)                 ((void *)__phys_to_virt((unsigned long)(x)))
  92
  93#ifndef CONFIG_DISCONTIGMEM
  94#define virt_to_page(kaddr)     (mem_map + (__pa(kaddr) >> PAGE_SHIFT) - \
  95                                 (PHYS_OFFSET >> PAGE_SHIFT))
  96#define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  97#endif
  98
  99#endif
 100
 101#endif
 102